/*
 * Copyright 2021 TiKV Project Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.tikv.common.log;

import java.util.Map;

public class SlowLogEmptyImpl implements SlowLog {
  public static final SlowLogEmptyImpl INSTANCE = new SlowLogEmptyImpl();

  private SlowLogEmptyImpl() {}

  @Override
  public SlowLogSpan start(String name) {
    return SlowLogSpanEmptyImpl.INSTANCE;
  }

  @Override
  public long getTraceId() {
    return 0;
  }

  @Override
  public long getThresholdMS() {
    return 0;
  }

  @Override
  public void setError(Throwable err) {}

  @Override
  public SlowLog withFields(Map<String, Object> fields) {
    return this;
  }

  @Override
  public Object getField(String key) {
    return null;
  }

  @Override
  public void log() {}
}
